by kuyakev on November 10th, 2007

kuyakev

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Are the fuel lines on commercial airplanes heated to keep them from freezing at high altitudes?

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  • by Grumpa on December 30th, 2007

    Grumpa

    Well, your answers so far seem to be a bit shy on facts. I am a commercial airline pilot and a retired air force pilot. We start worrying about fuel temperatures when they approach -40c. Commercial grade aviation fuel carries an anti-icing agent to help prevent gelling (the main worry) and freezing. NO, we do not heat the fuel in the tank nor do we have a switch to turn on/off a fuel heater. Most modern commercial jets heat the fuel indirectly, and automatically, by passing it through a fuel/oil heater whereby two radiator-type devices sit side by side. The heat from the engine oil warms the incoming fuel and thus cools the engine oil.

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